refactor(multiple-subtitles): [PKG-MULTI-SUB-04] expose compatible runtime type entry

refactor/tasks.json

@@ -2325,7 +2325,9 @@
       "acceptance": "严格类型检查、旧消费样例通过；声明路径/导出和同步异步兼容",
       "evidence": [
         "baselines/multiple-subtitles-runtime-types.json",
-        "changes/2026-09-13-PKG-MULTI-SUB-04-runtime-types.md"
+        "changes/2026-09-13-PKG-MULTI-SUB-04-runtime-types.md",
+        "baselines/multiple-subtitles-public-types.json",
+        "changes/2026-09-13-PKG-MULTI-SUB-04-public-types.md"
       ]
     },
     {